The following error results when trying to 'import socket' on a system
running glibc-2.1.3:
"ImportError: /usr/lib/python1.5/lib-dynload/socketmodule.so: symbol
gethostbyaddr_r, version GLIBC_2.1.2 not defined in file libc.so.6 with
link time reference "

The reference appears to be to the following symbol:
gethostbyaddr_r@@GLIBC_2.1.2 , which should be ok with a more recent
version of libc but is not. There are also other modules with similar
dependencies. 

By recompiling the python1.5.2-28 SRPM the only depencencies I now see are
based on glibc-2.0 or 2.1, no sub-minor version number.